C#中(.net1.1)公元历转农历的算法
参考C语言农历200年算法(1900－2100)改写
现行比较常用而精确的农历算法基本上是根据紫金山天文台发布的农历数据来转换的，可惜在天文台网站没有相关的数据发布，我所得到得数据是从原文中获取的。
先看看预先定义的数据：
//旧历数据1901年-2100年
internal static uint[] LunarCalendarTable ={
0x04AE53,0x0A5748,0x5526BD,0x0D2650,0x0D9544,0x46AAB9,0x056A4D,0x09AD42,0x24AEB6,0x04AE4A,/*1901-1910*/
0x6A4DBE,0x0A4D52,0x0D2546,0x5D52BA,0x0B544E,0x0D6A43,0x296D37,0x095B4B,0x749BC1,0x049754,/*1911-1920*/
0x0A4B48,0x5B25BC,0x06A550,0x06D445,0x4ADAB8,0x02B64D,0x095742,0x2497B7,0x04974A,0x664B3E,/*1921-1930*/
0x0D4A51,0x0EA546,0x56D4BA,0x05AD4E,0x02B644,0x393738,0x092E4B,0x7C96BF,0x0C9553,0x0D4A48,/*1931-1940*/
0x6DA53B,0x0B554F,0x056A45,0x4AADB9,0x025D4D,0x092D42,0x2C95B6,0x0A954A,0x7B4ABD,0x06CA51,/*1941-1950*/
0x0B5546,0x555ABB,0x04DA4E,0x0A5B43,0x352BB8,0x052B4C,0x8A953F,0x0E9552,0x06AA48,0x7AD53C,/*1951-1960*/
0x0AB54F,0x04B645,0x4A5739,0x0A574D,0x052642,0x3E9335,0x0D9549,0x75AABE,0x056A51,0x096D46,/*1961-1970*/
0x54AEBB,0x04AD4F,0x0A4D43,0x4D26B7,0x0D254B,0x8D52BF,0x0B5452,0x0B6A47,0x696D3C,0x095B50,/*1971-1980*/
0x049B45,0x4A4BB9,0x0A4B4D,0xAB25C2,0x06A554,0x06D449,0x6ADA3D,0x0AB651,0x093746,0x5497BB,/*1981-1990*/
0x04974F,0x064B44,0x36A537,0x0EA54A,0x86B2BF,0x05AC53,0x0AB647,0x5936BC,0x092E50,0x0C9645,/*1991-2000*/
0x4D4AB8,0x0D4A4C,0x0DA541,0x25AAB6,0x056A49,0x7AADBD,0x025D52,0x092D47,0x5C95BA,0x0A954E,/*2001-2010*/
0x0B4A43,0x4B5537,0x0AD54A,0x955ABF,0x04BA53,0x0A5B48,0x652BBC,0x052B50,0x0A9345,0x474AB9,/*2011-2020*/
0x06AA4C,0x0AD541,0x24DAB6,0x04B64A,0x69573D,0x0A4E51,0x0D2646,0x5E933A,0x0D534D,0x05AA43,/*2021-2030*/
0x36B537,0x096D4B,0xB4AEBF,0x04AD53,0x0A4D48,0x6D25BC,0x0D254F,0x0D5244,0x5DAA38,0x0B5A4C,/*2031-2040*/
0x056D41,0x24ADB6,0x049B4A,0x7A4BBE,0x0A4B51,0x0AA546,0x5B52BA,0x06D24E,0x0ADA42,0x355B37,/*2041-2050*/
0x09374B,0x8497C1,0x049753,0x064B48,0x66A53C,0x0EA54F,0x06B244,0x4AB638,0x0AAE4C,0x092E42,/*2051-2060*/
0x3C9735,0x0C9649,0x7D4ABD,0x0D4A51,0x0DA545,0x55AABA,0x056A4E,0x0A6D43,0x452EB7,0x052D4B,/*2061-2070*/
0x8A95BF,0x0A9553,0x0B4A47,0x6B553B,0x0AD54F,0x055A45,0x4A5D38,0x0A5B4C,0x052B42,0x3A93B6,/*2071-2080*/
0x069349,0x7729BD,0x06AA51,0x0AD546,0x54DABA,0x04B64E,0x0A5743,0x452738,0x0D264A,0x8E933E,/*2081-2090*/
0x0D5252,0x0DAA47,0x66B53B,0x056D4F,0x04AE45,0x4A4EB9,0x0A4D4C,0x0D1541,0x2D92B5,0x0D5349 /*2091-2100*/
};
以上定义的是一个无符号整型数组，随后的数据赋值是根据农历数据的2进制转换到16进制的数据；我们来看看农历数据的数据结构，比数组第一个数据0x04AE53是公元历1901年对应的农历数据，换算成2进制得到19位2进制1001010111001010011，整个农历的数据结构是占用32位整型的0-23共24位t数据，故1901年的整个数据000001001010111001010011。我们从数据的左边开始，说明一下整个数据的含义。
|
23 |
22 |
21 |
20 |
|
表示当年闰月的月份，值为0表示当年无闰月。 |
|||
说明数据的数据中23-20位为0000，表示在公元1901年农历春节后无闰月。
再看看19-7位的数据
|
19 |
18 |
17 |
16 |
15 |
14 |
13 |
12 |
11 |
10 |
9 |
8 |
7 |
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
|
农历1－13月大小 ，1为大月30天，0为小月29天 |
||||||||||||
如果有闰月，如闰2月，则闰2月排在17位的3月，农历3月则排在16位的4月
我们在看看1901年农历的对应月份
|
19 |
18 |
17 |
16 |
15 |
14 |
13 |
12 |
11 |
10 |
9 |
8 |
7 |
| 0 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 0 |
| 29 | 30 | 29 | 29 | 30 | 29 | 30 | 29 | 30 | 30 | 30 | 29 |
最后看看第6位－第0位的结构
|
6 |
5 |
4 |
3 |
2 |
1 |
0 |
|
1 |
0 |
1 |
0 |
0 |
1 |
1 |
| 春节公历的月份 | 春节公历的日期 | |||||
以上经过换算1901年春节公历月份10为2月，公历日期10011为19号
以下是我在C#下写的转换类库，还不算很完全，基本能过获取转换后的旧历。
OldData.cs:
using System;
namespace CsOldCalendar
{
/// <summary>
/// Data 的摘要说明。
/// </summary>
internal sealed class OldData
{
//旧历数据1901年-2100年
internal static uint[] LunarCalendarTable ={
0x04AE53,0x0A5748,0x5526BD,0x0D2650,0x0D9544,0x46AAB9,0x056A4D,0x09AD42,0x24AEB6,0x04AE4A,/*1901-1910*/
0x6A4DBE,0x0A4D52,0x0D2546,0x5D52BA,0x0B544E,0x0D6A43,0x296D37,0x095B4B,0x749BC1,0x049754,/*1911-1920*/
0x0A4B48,0x5B25BC,0x06A550,0x06D445,0x4ADAB8,0x02B64D,0x095742,0x2497B7,0x04974A,0x664B3E,/*1921-1930*/
0x0D4A51,0x0EA546,0x56D4BA,0x05AD4E,0x02B644,0x393738,0x092E4B,0x7C96BF,0x0C9553,0x0D4A48,/*1931-1940*/
0x6DA53B,0x0B554F,0x056A45,0x4AADB9,0x025D4D,0x092D42,0x2C95B6,0x0A954A,0x7B4ABD,0x06CA51,/*1941-1950*/
0x0B5546,0x555ABB,0x04DA4E,0x0A5B43,0x352BB8,0x052B4C,0x8A953F,0x0E9552,0x06AA48,0x7AD53C,/*1951-1960*/
0x0AB54F,0x04B645,0x4A5739,0x0A574D,0x052642,0x3E9335,0x0D9549,0x75AABE,0x056A51,0x096D46,/*1961-1970*/
0x54AEBB,0x04AD4F,0x0A4D43,0x4D26B7,0x0D254B,0x8D52BF,0x0B5452,0x0B6A47,0x696D3C,0x095B50,/*1971-1980*/
0x049B45,0x4A4BB9,0x0A4B4D,0xAB25C2,0x06A554,0x06D449,0x6ADA3D,0x0AB651,0x093746,0x5497BB,/*1981-1990*/
0x04974F,0x064B44,0x36A537,0x0EA54A,0x86B2BF,0x05AC53,0x0AB647,0x5936BC,0x092E50,0x0C9645,/*1991-2000*/
0x4D4AB8,0x0D4A4C,0x0DA541,0x25AAB6,0x056A49,0x7AADBD,0x025D52,0x092D47,0x5C95BA,0x0A954E,/*2001-2010*/
0x0B4A43,0x4B5537,0x0AD54A,0x955ABF,0x04BA53,0x0A5B48,0x652BBC,0x052B50,0x0A9345,0x474AB9,/*2011-2020*/
0x06AA4C,0x0AD541,0x24DAB6,0x04B64A,0x69573D,0x0A4E51,0x0D2646,0x5E933A,0x0D534D,0x05AA43,/*2021-2030*/
0x36B537,0x096D4B,0xB4AEBF,0x04AD53,0x0A4D48,0x6D25BC,0x0D254F,0x0D5244,0x5DAA38,0x0B5A4C,/*2031-2040*/
0x056D41,0x24ADB6,0x049B4A,0x7A4BBE,0x0A4B51,0x0AA546,0x5B52BA,0x06D24E,0x0ADA42,0x355B37,/*2041-2050*/
0x09374B,0x8497C1,0x049753,0x064B48,0x66A53C,0x0EA54F,0x06B244,0x4AB638,0x0AAE4C,0x092E42,/*2051-2060*/
0x3C9735,0x0C9649,0x7D4ABD,0x0D4A51,0x0DA545,0x55AABA,0x056A4E,0x0A6D43,0x452EB7,0x052D4B,/*2061-2070*/
0x8A95BF,0x0A9553,0x0B4A47,0x6B553B,0x0AD54F,0x055A45,0x4A5D38,0x0A5B4C,0x052B42,0x3A93B6,/*2071-2080*/
0x069349,0x7729BD,0x06AA51,0x0AD546,0x54DABA,0x04B64E,0x0A5743,0x452738,0x0D264A,0x8E933E,/*2081-2090*/
0x0D5252,0x0DAA47,0x66B53B,0x056D4F,0x04AE45,0x4A4EB9,0x0A4D4C,0x0D1541,0x2D92B5,0x0D5349 /*2091-2100*/
};
//internal static short[] MonthAdd ={0,31,59,90,120,151,181,212,243,273,304,334};
internal static string[] OldDay = {"*","初一","初二","初三","初四","初五","初六","初七","初八","初九","初十",
"十一","十二","十三","十四","十五","十六","十七","十八","十九","二十",
"廿一","廿二","廿三","廿四","廿五","廿六","廿七","廿八","廿九","三十"};
internal static string[] OldMonth ={"*","正","二","三","四","五","六","七","八","九","十","十一","腊"};
private OldData()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
}
}
OldCalendar.CS：
using System;
using NUnit.Framework;
namespace CsOldCalendar
{
/// <summary>
/// OldCalendar 的摘要说明。
/// </summary>
public class OldCalendar
{
const string DateSetError="输入的日期不正确，年份：/"0-9999/"、月份：/"1-12/"、日期：/"1-31/"。";
//旧历闰年标记
private bool _oldLeapYearFlag = false;
//旧历闰月标记
private bool _oldLeapMonthFlag = false;
//旧历年份
private string _oldYear = null;
//旧历月份
private string _oldMonth = null;
//旧历日期
private string _oldDay = null;
//公历年/月日
private int _year;
private int _month;
private int _day;
private DateTime _date;
//是否可以转换
private bool _enabled=false;
//转换日期范围
private DateTime _minDateTime;
private DateTime _maxDateTime;
/// <summary>
/// 获取公历Date属性
/// </summary>
public DateTime Date
{
get{return this._date;}
}
/// <summary>
/// 获取公历年份属性
/// </summary>
public int Year
{
get{return this._year;}
}
/// <summary>
/// 获取公历月份属性
/// </summary>
public int Month
{
get{return this._month;}
}
/// <summary>
/// 获取公历日期属性
/// </summary>
public int Day
{
get{return this._day;}
}
/// <summary>
/// 获取旧历数字年份属性
/// </summary>
public string OldYear
{
get{return this._oldYear;}
}
/// <summary>
/// 获取旧历月份属性
/// </summary>
public string OldMonth
{
get{return this._oldMonth;}
}
/// <summary>
/// 获取旧历天数属性
/// </summary>
public string OldDay
{
get{return this._oldDay;}
}
/// <summary>
/// 获取旧历月是否闰月属性
/// </summary>
public bool IsLeapOldMonth
{
get{return this._oldLeapMonthFlag;}
}
/// <summary>
/// 获取旧历年是否闰年属性
/// </summary>
public bool IsLeapOldYear
{
get {return this._oldLeapYearFlag;}
}
/// <summary>
/// 获取最小转换日期属性
/// </summary>
public DateTime MinDateTime
{
get
{
return this._minDateTime;
}
}
/// <summary>
/// 获取最大转换日期属性
/// </summary>
public DateTime MaxDateTime
{
get{return this._maxDateTime;}
}
/// <summary>
/// 获取是否允许转换为旧历
/// </summary>
public bool IsEnabled
{
get{return this._enabled;}
}
/// <summary>
/// 构造函数，无参数取当前系统日期，并设置旧历属性。
/// </summary>
public OldCalendar()
{
//设置转换日期范围
SetConverBound();
DateTime dt = DateTime.Now;
this._year = dt.Year;
this._month = dt.Month;
this._day = dt.Day;
this._date = dt;
//判断是否在转换范围
if(dt <this._minDateTime || dt>this.MaxDateTime)
this._enabled = false;
else
this._enabled = true;
//旧历转换
OldConver();
}
/// <summary>
/// 构造函数，分别输入年/月/日参数，并设置旧历属性，如参数超出范围则引发异常。
/// </summary>
/// <param name="year">年：1-9999</param>
/// <param name="month">月：1-12</param>
/// <param name="day">日：1-month中的天数</param>
public OldCalendar(int year,int month,int day)
{
DateTime dt;
try
{
dt = new DateTime(year,month,day);
}
catch
{
this._enabled = false;
throw new Exception(DateSetError);
}
this._date = dt;
this._year = year;
this._month = month;
this._day = day;
//设置日期转换范围
SetConverBound();
//判断是否在转换范围
if(dt <this._minDateTime || dt>this.MaxDateTime)
this._enabled = false;
else
this._enabled = true;
//旧历转换
OldConver();
}
/// <summary>
/// 构造函数，并设置旧历属性
/// </summary>
/// <param name="dt">System.DateTime</param>
public OldCalendar(DateTime dt)
{
//设置转换日期范围
SetConverBound();
this._year = dt.Year;
this._month = dt.Month;
this._day = dt.Day;
this._date = dt;
//判断是否在转换范围
if(dt <this._minDateTime || dt>this.MaxDateTime)
this._enabled = false;
else
this._enabled = true;
//旧历转换
OldConver();
}
/// <summary>
/// 设置转换范围
/// </summary>
private void SetConverBound()
{
int year,month,day;
year =1901;
if(((OldData.LunarCalendarTable[year-1901] & 0x0060)>>5)==1)
month=1;
else
month=2;
day =(int) OldData.LunarCalendarTable[year-1901] & 0x001F;
this._minDateTime = new DateTime(year,month,day);
year = 1900+OldData.LunarCalendarTable.Length;
month = 12;
day = DateTime.DaysInMonth(year,month);
this._maxDateTime = new DateTime(year,month,day);
}
private void OldConver()
{
if(this._enabled == false)
return;
int spring_NY; //待转换公历当年春节离元旦天数
int sun_NY; //待转换公历当天离元旦的天数
int oldDayCount; //转换时旧历月的天数
int index; //旧历月索引(无闰1－12有闰1－13)
int flag; //闰月的特殊处理标志
uint oldData; //旧历数据
int year,month,day; //用于转换年月日临时变量
year = this._year;
//month = this._month;
//day = this._day;
oldData = OldData.LunarCalendarTable[year-1901];
if(((oldData & 0x0060)>>5)==1) //春节在1月
spring_NY = (int)(oldData & 0x001F) -1;
else //春节在2月
spring_NY = (int)(oldData & 0x001F) -1 +31;
sun_NY = this._date.DayOfYear -1;
//公历在春节前后的转换
if(sun_NY >= spring_NY) //在春节或春节之后
{
//旧历是否闰年
if((oldData & 0xF00000>>20)==0)
this._oldLeapYearFlag = false;
else
this._oldLeapYearFlag = true;
sun_NY -= spring_NY;
month = 1;
index = 1;
flag = 0;
//获取旧历开始月的天数
if((oldData & (0x80000>>(index-1)))==0)
oldDayCount = 29;
else
oldDayCount = 30;
while(sun_NY >= oldDayCount)
{
sun_NY -= oldDayCount;
index++;
if(month == (int)((oldData &0xF00000)>>20))
{
flag =~flag;
if(flag ==0)
month++;
}
else
month++;
//下个月旧历的天数
if((oldData & (0x80000 >>(index-1)))==0)
oldDayCount =29;
else
oldDayCount = 30;
}
day = sun_NY +1;
} //春节后转换结束
else //春节前
{
spring_NY -= sun_NY;
year--;
month =12;
oldData = OldData.LunarCalendarTable[year-1901];
//旧历是否闰年
if((oldData & 0xF00000>>20)==0)
this._oldLeapYearFlag = false;
else
this._oldLeapYearFlag = true;
if(this._oldLeapYearFlag == false)
index =12;
else
index =13;
flag =0;
if((oldData & (0x80000 >>(index-1)))==0)
oldDayCount =29;
else
oldDayCount =30;
while(spring_NY > oldDayCount)
{
spring_NY -= oldDayCount;
index--;
if(flag==0)
month--;
if(month ==(int)((oldData & 0xF00000) >>20))
flag = ~flag;
if((oldDayCount &(0x80000 >>(index-1)))==0)
oldDayCount = 29;
else
oldDayCount =30;
}
day = oldDayCount - spring_NY +1;
} //春节前后的转换结束
//给成员变量旧历部分赋值
this._oldDay = OldData.OldDay[day];
this._oldMonth = OldData.OldMonth[month];
this._oldYear = year.ToString();
if((month == (int)((oldData & 0xF00000)>>20)) && (flag!=0))
this._oldLeapMonthFlag = true;
else
this._oldLeapMonthFlag = false;
}
}
/// <summary>
///
/// </summary>
[TestFixture]
public class OldCalendarTest
{
private OldCalendar oc;
private OldCalendar oc1;
public OldCalendarTest()
{
oc = new OldCalendar(2006,9,21);
oc1 = new OldCalendar(2006,8,21);
}
[Test]
public void TestOldConver()
{
Console.WriteLine(oc1.IsEnabled.ToString());
Console.WriteLine(oc1.IsLeapOldMonth.ToString());
Console.WriteLine(oc1.OldMonth+"月");
Console.WriteLine(oc1.OldDay+"日");
Console.WriteLine();
Console.WriteLine(oc.IsEnabled.ToString());
Console.WriteLine(oc.IsLeapOldMonth.ToString());
Console.WriteLine(oc.OldMonth+"月");
Console.WriteLine(oc.OldDay+"日");
}
}
}
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